diff --git a/src/include/pool.h b/src/include/pool.h
index 549aed30f..ef0876c84 100644
--- a/src/include/pool.h
+++ b/src/include/pool.h
@@ -345,7 +345,7 @@ extern int	pool_get_major_version(void);
 extern bool pool_is_node_to_be_sent_in_current_query(int node_id);
 extern int	pool_virtual_main_db_node_id(void);
 
-extern BACKEND_STATUS *my_backend_status[];
+extern volatile BACKEND_STATUS *my_backend_status[];
 extern int	my_main_node_id;
 
 #define VALID_BACKEND(backend_id) \
diff --git a/src/main/pgpool_main.c b/src/main/pgpool_main.c
index 19d89cb79..ab8946228 100644
--- a/src/main/pgpool_main.c
+++ b/src/main/pgpool_main.c
@@ -277,7 +277,9 @@ static pid_t pgpool_logger_pid = 0; /* pid for pgpool_logger process */
 static pid_t wd_lifecheck_pid = 0;	/* pid for child process handling watchdog
 									 * lifecheck */
 
-BACKEND_STATUS *my_backend_status[MAX_NUM_BACKENDS];	/* Backend status buffer */
+/* Backend status buffer */
+volatile BACKEND_STATUS *my_backend_status[MAX_NUM_BACKENDS];
+
 int			my_main_node_id;	/* Main node id buffer */
 
 /*